Note 1 - Summary of Significant Accounting Policies (Details) - Accounts Receivable and Allowance for Doubtful Accounts, Activity (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	$ 17	$ 17	$ 18
Charged to Expense	13	13	1
(Write-offs) Net of Recoveries	(17)	(13)	(2)
Balance at at End of Period	$ 13	$ 17	$ 17